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Question

Which subshell begins filling after the 5s subshell in multi-electron atoms?

Options

Choose one · Correct answer highlighted

Explanation

The Aufbau order is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, ldots. After 5s, the 4d subshell fills. This follows from NCERT principle where relation explains outcome clearly for students.

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